Vrg. Anand et al., Meso aryl heptaphrins: The first 30 pi aromatic expanded porphyrins with an inverted structure, ORG LETT, 2(24), 2000, pp. 3829-3832
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Synthesis of new meso aryl 30 pi heptaphyrins 2, 3, and 4 is achieved, Spec
troscopic studies reveal that 2, 3, and 4 are aromatic and possess an inver
ted structure.